root/trunk/oldXMenu/Post.c

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1 /* Copyright    Massachusetts Institute of Technology    1985   */
2
3 #include "copyright.h"
4
5
6 /*
7  * XMenu:       MIT Project Athena, X Window system menu package
8  *
9  *      XMenuPost -     Maps a given menu to the display and activates
10  *                      the menu for user selection.  The user is allowed to
11  *                      specify the mouse button event mask that will be used
12  *                      to identify a selection request.  When a selection
13  *                      request is received (i.e., when the specified mouse
14  *                      event occurs) the data  returned will be either the
15  *                      data associated with the particular selection active
16  *                      at the time of the selection request or NULL if no
17  *                      selection was active.  A menu selection is shown to
18  *                      be active by placing a highlight box around the
19  *                      selection as the mouse cursor enters its active
20  *                      region.  Inactive selections will not be highlighted.
21  *                      As the mouse cursor moved from one menu pane
22  *                      to another menu pane the pane being entered is raised
23  *                      and activated and the pane being left is deactivated.
24  *                      If an error occurs NULL will be returned with the
25  *                      p_num set to POST_ERROR, s_num set to
26  *                      NO_SELECTION and _XMErrorCode set to an
27  *                      appropriate value.
28  *                      Every time the routine returns successfully the
29  *                      p_num and s_num indices will be set to indicate
30  *                      the currently active pane and/or selection.  If the
31  *                      mouse was not in a selection window at the time
32  *                      s_num will be set to NO_SELECTION.
33  *
34  *      Author:         Tony Della Fera, DEC
35  *                      August, 1984
36  *
37  */
38
39 #include "XMenuInt.h"
40
41 char *
42 XMenuPost(display, menu, p_num, s_num, x_pos, y_pos, event_mask)
43     register Display *display;  /* Previously opened display. */
44     register XMenu *menu;       /* Menu to post. */
45     register int *p_num;        /* Pane number selected. */
46     register int *s_num;        /* Selection number selected. */
47     register int x_pos;         /* X coordinate of menu position. */
48     register int y_pos;         /* Y coordinate of menu position. */
49     int event_mask;             /* Mouse button event mask. */
50 {
51     register int stat;          /* Routine call return status. */
52     char *data;                 /* Return data. */
53
54     /*
55      * Set up initial pane and selection assumptions.
56      */
57
58     /*
59      * Make the procedure call.
60      */
61     stat = XMenuActivate(
62                          display,
63                          menu,
64                          p_num, s_num,
65                          x_pos, y_pos,
66                          event_mask,
67                          &data, 0);
68
69     /*
70      * Check the return value and return accordingly.
71      */
72     switch (stat) {
73         case XM_FAILURE:
74             *p_num = POST_ERROR;
75             *s_num = NO_SELECTION;
76             return(NULL);
77         case XM_NO_SELECT:
78         case XM_IA_SELECT:
79             *s_num = NO_SELECTION;
80             return(NULL);
81         case XM_SUCCESS:
82         default:
83             return(data);
84     }
85 }
86
87 /* arch-tag: 7b6104e5-fa32-4342-aa17-05296a30dd70
88    (do not change this comment) */
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